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Amy: Christmas is coming. 1．
Bill: OK. I want to buy some food. 2．
Amy: I’m going to buy some gifts.
Bill: 3．
Amy: I’m going to buy some gifts for my grandma and grandpa.
Bill: That’s great! 4．
Amy: He is fun. 5．
Bill: I don’t think so.
| A．Look. Here is Santa. |
| B．Who are you going to give the gifts to? |
| C．Let’s go shopping for it. |
| D．What are you going to buy? |
| E．Do you think Santa brings gifts for us? |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
